I am getting banned on any accounts.

Hello,

I am getting banned on any accounts I make and try to play, I have try to play on 3 different computers doesn't make different I still get banned on all the accounts on anything computers I played, one of the computer is brand new nothing but crossfire installed just got like few days ago, I have send so many tickets regarding they are not saying why I am being banned for, I just get copy and paste answer.. how the hell I would know by that what I am doing wrong?